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- Title
High-Temperature Solid Lubricant Coating by Plasma Spraying Using Metal-Metal Clad Powders.
- Authors
Zhang, Tiantian; Lan, Hao; Yu, Shouquan; Huang, Chuanbing; Du, Lingzhong; Zhang, Weigang
- Abstract
NiCr/Ag-Mo composite coating was fabricated by atmospheric plasma spray technology using clad powders as the feedstock. Its tribological properties at variable temperature were evaluated using a ball-on-disk high-temperature tribometer in air. The results showed that compared with NiCr, the NiCr/Ag-Mo composite coating exhibited better lubrication effect and higher wear resistance at all test temperatures, especially above 600 °C. At 800 °C, NiCr/Ag-Mo composite coating showed the lowest friction coefficient of about 0.2 and its corresponding wear rate reached 2.5 × 10 mm/Nm. Characterizations of NiCr/Ag-Mo composite coating revealed that at temperatures below 400 °C, Ag was smeared and spread onto the wear surface, reducing the friction and wear. At temperature above 500 °C, the AgMoO lubrication film formed by tribo-oxidation significantly improved the coating's lubrication effect and wear resistance.
- Subjects
PLASMA sprayed coatings; SOLID lubricants; METAL cladding; METAL powders; HIGH temperature metallurgy
- Publication
Journal of Thermal Spray Technology, 2017, Vol 26, Issue 6, p1268
- ISSN
1059-9630
- Publication type
Article
- DOI
10.1007/s11666-017-0591-0